A bit ago my moped wouldn't start so i decided to check the spark plug and sure enough it was all black. So I changed it thinking that would fix it, and it did for about a month. Today I decided to go for a ride and it wouldn't start, so I checked the spark plug again and it was all black and fouled up. My question is why does it keep fouling up? I think the carb. is fairly clean, so i don't think it's that. But it could be, i don't know.
swarm and destroy